Is there some sort of price list available somewhere?
Yes.
The value of celestial bodies depends on two things:
1) The type of body.
2) Its mass.
Without going into too much detail, here's what you're looking at for detailed scans:
Gas Giants
...with Ammonia Based Life: ~500 to 1000
...Helium Rich: ~500 to 1000
...Class I: ~1000 to 2000
...Class II: ~5000 to 6000
...Class III: ~700 to 1200
...Class IV: ~700 to 1200
...with Water Based Life: ~500 to 1000
Water Giants
...I don't yet know, but I suspect about the same as a gas giant.
Small Planets
...High Metal Content: ~2000 to 4000
...Icy: ~300 to 800
...Metal Rich: ~4100 to 6000
...Rocky Ice: ~400 to 500
...Rocky: ~300 to 400
...Ammonia: unknown
Protostars:
...T Tauris: ~1200
...Herbig Ae/Be: ~unknown, probably ~1300 (as they're more massive than most stars)
Stars:
...OBAFGKM of any size: ~1200, up to about 3400 for the very largest stars, but almost all are about 1200
...Carbon Stars (C,S): ~1200 as above
...Wolf Rayet: ~unknown, probably ~1200
Stellar Remnants:
...Black Hole: ~~20000, I don't have enough data to be more precise on the range
...Neutron Stars: ~18000 to 20000
...White Dwarfs: ~9000 to 13000
Valuable Planets:
...Earth Like Worlds: ~28000 to 31000
...Water Worlds (candidate for terraforming): ~22000 to 30000
...Water Worlds: ~10000 to 14000
...High Metal Content (candidate for terraforming): unknown
I'm working on it.
(edited to add)
The value of an object does not appear to depend
at all upon how many people have scanned it.
Most gas giants, including life-bearing and helium rich, fall into a fairly low value curve.
Class II gas giants (usually bright white) are good value.
If you know of any objects I've missed out, please say. I don't think Pulsars are explicitly modeled and the same goes for variable stars e.g. Delta Scuti is in but without any special note.
