I think $25 for a good looking gaming case is not realistic.
1) As to looks, that is a personal thing. I don't like side windows and "bling"; others want them. I like small simple classic cases, others want tall streamlined cases...
You get the idea. Looks is YOUR call to make.
2) For gaming, any case with two 120mm intake or exhaust fans, or equivalent will be perfectly fine fo gaming with a single graphics card.
If it gets a bit hot, so be it, the graphics cards and cpu's are built to take it.
3) On pricing, add in the shipping costs. Cases can be heavy, and cost $20 to ship.
4) Features count too. I don't value toolless much. Only if you are constantly swapping parts might that be good.
I do like washable intake filters. It is a pain to take your pc apart every quarter to clean out the dust and cat hair.
5) Size matters too. A strong graphics card can be 12" long. Many strong graphics cards will be 10.5" Check that first or you will have to mod the case yourself.
Will it hold your parts? Most gamers will use only one or two drives. Possibly one mught be a 2.5"SSD. For that, you can use a m-ATX motherboard which will be smaller and cheaper. Perhaps an even smaller M-ITX motherboard.
6) Quality counts. Cheap cases will bend, crack, rust, or whatever, and need replacing.
7) Customer support?? Antec will replace any parts that breaks with no hassle.
8) Here is a $40 case with free shipping that looks good and will do the job. NZXT source 210:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811146076
In the end. pick a case you lust after. Overspend your budget to do so. You will be looking at it for a long time.
Remember that the bitterness of a poor product lingers long after the sweetness of the price is forgotten.