What's a "good" price for HP-41 Time Module?

[smp]

I see an auction for an HP-41 Time Module:

http://www.ebay.com/itm/131985458547?_tr...EBIDX%3AIT

This is a high price for me, but I also recognize that it is much lower than auctions for HP-41 modules usually are on TAS.

So, my question is, what would others be willing to pay for an HP-41 Time Module? What amount have you had to pay? Am I fooling myself that I should be able to acquire one of these for a price lower than this?

Thanks for your thoughts!

smp