This looks to be a 1984 Ming Tien bike with mismatching wheels but I'm not too sure if it's collectible or not. In this area, getting a old school bmx of any brand, in any condition, for $120 is a good deal, but I thought I'd throw it out to the BMX guys to school me on a potential purchase. Like to know what it's worth (and what I should offer), if it's collectible, and any other info you would care to share.
http://vancouver.craigslist.ca/rds/bik/5513614254.html
http://vancouver.craigslist.ca/rds/bik/5513614254.html