i can always cancel my bid if this price is not worth it so i need your help

http://www.ebay.com/itm/221362365838?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649

this seller is selling a nintendo 3ds for $140 which i bid $140theres like 1 watcher on this listing its not like im going to lose

my automatic bid is set to $160 just to make sure i win

http://www.ebay.com/itm/221360007523?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649

this seller is selling a cpu gpu and a motherboard and i was wondering if it is worth the money

$502 for cpu gpu and motherboard

if its not can you guys tell me a gaming pc build