Big problem

So basically in my country, we have a site similar to Craigslist, basically a second hand. I saw a listing whit a GTX 970 for 80€ (Asus Strix idk if it is OC or not) and a GTX 1060 6gb for 130€ (same as the 970) and I want to pair it whit my A10-7800 but I plan to upgrade it to R5 2600X. But...