price for used r9 270x?

[nipplethewhale]

i bought a asus r9 270x last year. looking to upgrade to gtx 970. how much can i sell my gpu for? planning to upgrade to dual gpus cuz getting a 4k.
original 200$ from amazon
perfect physical condition
never overclocked
never disassembled
ran easy games like LOL and csgo
could i get over 100$? i see on craigslist gtx 580 going for 150$.

 

[helpstar]

now you can get a new ASUS R9 270x for about 166$ (US)
on amazon you can get around 115$ (the charge is really high on amazon)
on ebay between 115 and 150$

so yes, you should get over 100$

which power supply do you use? brand and model
the sli will need more power and more connectors

which motherboard? Does it support SLI or just crossfire?