I look all the time all over the place and I don't see anything at $100. I guess you guys have luck with that.If you are going by eBay pricing, they ASK $150+. I see them on craigslist and musicgoround offered for less. In my 5 years of sharking the interweb, you can get them from $65 to $125 easily if you look, and act. Unless they are keystone badged 60s, which can go higher. You just need to look. I never have paid over $100 for any Acro including bag and stand, and I've had over a dozen.
And don't forget to search "Biman"!