a couple days ago i say this guy use a pedal that he could loop a riff he did...or sumthing....i dunno ...but that would b cool to practice soloing...i wanna get one but i have no idea what it is or how much it costs....help me out

Price depends on how long the loop is.

Their is something called a Loop Station by boss

http://www.music123.com/Boss-RC-20XL-i144689.music

which will give you up to 16 min

or the slightly older RC20

or the DD3 or DD6 (which will do about 5 seconds) and cost about 150 bucks.