best tip is to try and find some info about it before u go. ie how long has it been running? amount of traders? cost to get it? etc. The people who run bowlers used to have a magazine called something like northern computer traders which used to have some useful info. Bowlers used to be good when it was only a couple of quid to get in but then it went to £5 so unless u were defo gunna buy something it was a bit of a steep entrance price, that said u could useually save a few quid on some items