How much should I pay for a 2001 Thiel CS 3.6?

you can afford Crown XI2000 right onto your budget.

Thanks everyone
I am so confused..
Came across a chance to buy these speakers around $1300 but really didn't plan on buying a high power amp until I met these speakers. there seems to be a consensus that these speakers must be driven by very strong components.
If you had this money for speakers and a 80-100W amp as a given, would it make sense to buy these at all? in this configuration, could they actually sound WORSE than a new pair of B&W you could buy at the store??
Thanks

That wouldn't make sense if you plan on keeping your current amp. You need at least 250wpc for these.

Have you considered something like the Vandersteen 2's?

Agree with Philojet, unless you intend on blasting the Thiels in a large room. I have owned a couple of Thiel speakers and they do have tipped up highs. Have also owned the NAD C352 and did feel it had a full-warm sound which may tame the Thiels.
If you like the Thiel sound and the price, I say go for them.
Definitely would not worry about their age.