I live in England - I bought VB4 (way back then) from Simply Computers - http://www.simply.co.uk, when I came to upgrade to VB5 I went to a local computer show and managed to pick it up for £50. It didn't have a manual but other than that it was a full original version.
Have a look at Simply - I've just searched for VB6 and they do VB6.01 Pro Educational edition (their ref SE1032) for £75 including VAT and delivery. (I'd ring them first and confirm that it is the full professional version and not some cut-down rubbish!)

Have fun.