Does anyone know what my Cinema 13HD (Sanyo PLV-60HT) projector is worth these days? I've replaced the bulb once. The new bulb has about 20-30 hrs on it.

That's a nice unit which still retains good retail value since it's an HD unit, so by the time your lamp goes out the 1080p units will drop in price.
As for how much it's worth I gues about 1/3 of the retail price since you are on your second lamp.

No more than $500 USD.

Interesting responses. $500 to $1700.

@Jones_Rush: With bulb cost at $400, you'd think people would just be replacing the whole thing (and have a spare PJ). Have you seen these going used for that price?

It's been hard trying to find any market value information for these things.

Since 720p projectors are dropping in prices the value for older units also drops , But just because the price is dropping does not mean that your excellent unit can't still give you quality images.

I just bought a used HitachiTX200 720p projector in the UK for $800 including a spare bulb.
Amazon.com are selling the Benq w500 720p projector new in the US for $899

I think $500-$600 is about the right price for a 720p in the US, why would anyone take the risk of paying more?

Because $500-600 to some is not a lot of money. It used to be nothing to me, until I recently bought a house - now it's a lot! =)

I would not sell a pj I paid $2000+ for when it came out for $500...that's not worth it to me

Definitely no more than $500 especially when you can get a new 720p Projector with much better contrast for $620