Trading a Macbook pro for tower, need advice.

Ask more specifics about the specs of that desktop

1. Specific model of processor
2. Motherboard
3. Power supply
4. RAM: how many sticks, what freq
5. request a picture of internals if possible (asses gen state of case, rust, etc)
6. Specific model of GPU
7. Optical and hard disk drive/s : condition and any warranty left, etc (applies to every hardware i guess)