hey, what have strippers ever done to deserve being classed with politicians?

In military purchasing, you'd barely get a washer for $20k, never mind an entire platform!

How much did they cost? When did you buy them? How much are they worth now. How much can you earn from using them? how much do they cost to run?

Add up all the costs, over 12 months, 24 months, 36 months. Add up all the potential revenue they'll earn.

  If the first is bigger than the second, you're losing money - sell them now for as much as you can, cut your losses. If the revenue is bigger, you might consider using Net Present Value (look up the NPV function in your favorite spreadsheet) to determine if it's really a profit. If the NPV is negative or zero, sell. Only if the NPV is postive , and by more than a fistfull of dollars, AND you're confident about the numbers should you hang on to them.

Or can you donate them to a charity, and write them off for tax?

Rant: given that performance / price ratio is constantly improving, why would anyone ever ever ever buy hardware a second before they absolutely have a proven need for it to earn a buck? That's like buying fuel, and letting it evaporate in the desert sun.