Asking Price of Semen

I'm cleaning my tanks of semen I'll never use and wondered what would be fair.  I thought whatever I can get, maybe $5/straw.  But I also have Powerstroke, Triple C Invasion, X-Ray Vision, Walks Alone and Monopoly Money that might be worth more.  I have 76 straws and thought $350 if it all went, at least the better stuff mentioned here.  That would average out to about $16/straw with the rest just thrown in, or thrown away.  Are some of the ones I listed here (Powerstroke, Invasion, X-Ray) really in demand and should sell for more?