Guitar aficionados can buy, sell, trade, ogle and get appraisals of all manner of instruments, accessories, books and memorabilia at the SoCal World Guitar Show. Prepare your finger-tapping solo in advance. OC Fair & Event Center, 88 Fair Drive, Costa Mesa. 10 a.m.-5 p.m. Sat. 10 a.m.-4 p.m. Sun. $15. (918) 288-2222. http://www.calshows.tv.