It should read out fine on his programmer if it's anything other than a willem. For $100 if you are looking to dump old games (prior to them using things you need adapters for) then the best BP Micro you can get, which might end up meaning you need a separate old computer for dumping to go with it if it's printer port or old drivers. Old computers work better with old programmers that's for sure.
I've paid under $100 for used BP Micros in the 1200 and 1400 range. They are the best for the buck if you are looking to dump older chips but you might have to watch for them on ebay for a very long time in order to win them at that price but I've done it as have many others. If you're wanting something brand new I don't know, I don't buy them but once every several years.