How to Convince My Parents to Let Me Build a Gaming PC

My parents don't want me to have an actual job, but rather focus on school work and getting good grades. The fact that I'm in Magnet(School that is 1 grade lvl above what I'm in) gives me a ton of work doesn't help. I'm in seventh grade, but I'm doing seventh and eighth grade stuff. I have mostly B's and 1 A, but my parents want me to have all A's, like my sister! (I don't know how she got those grades, she went through magnet in the same school). My parents just don't know how hard it is...

Well, this is a lot of people in a short amount of time. I will answer everyone all at once, cause' I'm pretty new to the forums and don't know how to quote.

So, about go to other neighbors and getting money like that. Well, the farthest I've gone is I make my bed every day for 1 dollar. And personally, that's kinda pointless, given that there are only 365 days in a year, so $365 dollars in a year. So I would have to wait 3 years before I get anything decent. Other than that, the rest of my family lives in another country, and there isn't much grass up here on the mountains. My parents probably would not allow me doing that.

Getting money. Aaah, like I've ever gotten money. I can't really celebrate birthdays, having it on Christmas Eve, and even then, whatever money I have my parents say that I have to use that money for college(which is about a few hundred dollars, part of that money my parents said I could use for anything BUT gaming).

About learning. My dad doesn't even know what grade I'm in. He thinks I'm either in 8th, 9th, or 7th. Then my mom corrects him. My dad thinks that you won't learn much because all you're doing is "assembling" a computer. He thinks its just getting parts and putting them together. So he doesn't get the educational part of this. When he comes bad home I'll tell him it could be useful for robotics (cause they want me to get into that club in high school, and I do too). And the price isn't really the big issue (well sort of, but not really). It's more of the fact that my dad doesn't feel like I need a new computer, or he doesn't want to get one equipped for gaming.

Well you see, I can't really "earn" it unless I get all A's (which, by the way, is almost impossible, like I think 5-10 people in my grade lvl have that). My parents don't exactly make any way of "earning" it. The second they hear something related to gaming, they instant response is NO. The only way I can get something for gaming is if I go head on and throw a BIG argument with tantrums, etc, which I don't personally enjoy.

So with that being said, I guess I'll wait and see what other people say. Isn't this a conundrum, isn't it? But, I APPRECIATE all of your answers and will take them into consideration (try using the ones I can to convince my parents).

I would accept the $800, if my dad didn't keep changing his mind like crazy and lie half the time. He suggested that he could buy another MBA (Macbook Air). Looking at just that, I feel like my dad shouldn't be making these weird restrictions and changing his mind and lying. But hey, my MBA overheats to about 80-109C playing mine craft with a 6500 RPM fan whirling. I really wish my computer would shut down so I would have reasons to get a better PC. Oh, why does Apple have to be that good?

I do know what are inside pre-built systems. Motherboard, GPU, CPU, PSU, case, OS, Hard Drive, CPU Cooler, and yeah, I think that's all of the parts.

I understand that my parents kinda control us all, and that we all were once certain ages. Yes, waiting might be the answer, but with Black Friday and Cyber Monday right round' the corner, and the Nvidia Path Deal ending right round' the corner, its hard to wait. In fact, thats the bane of my existence. Patience.

No, I actually don't That's what I'm waiting for, to see what he has in his office. Chances are, thats what I'm gonna use. I'm scared that it would be near the same performance as my laptop, as I wouldn't think you would need a high end PC to run such basic stuff, such as programming. What I would like to see, however, is to have a computer made for professional picture/video editing, if he even has one in his office, cause those have pretty good stuff. I'm not sure if the video/picture editing is done by another company/place.

I was answering what another person had said, sorry. But yeah, I think pre-built PC's use cheap stuff to gain more profit.

I was thinking about ordering online, my parents would never even think about shopping on black friday.

I'm also a little worried about the part's price, their prices are slowly rising, they rises $100-200 in the last week or so.