i7 4770 for 150$ or i5 4690 for 120$ (with spare parts)

delaro

Judicious
Ambassador
It's a Small Form Factor you will have issues upgrading the GPU because of restricted space and a specially designed small power supplies. These are refurbished business machines from someone with bank/school or other business contract. Are they worth the less than $200 price tag? Yes and No, gaming wise you have limited upgrade potential with the GPU but as a whole the systems are quite capable of giving a decent performance for common tasks.