Pelts are very very cheap. At least the cold/hot plate is fairly cheap. Pelts are only worth it if you have watercooling. The hot side of a powerful peltier can get very hot. that why you need to cool it with water cooling. But the cooling capabilities will get your temperatures to sub-ambient. Powerful peltiers also require a 24V psu to power it to get it at its full potential. But peltiers are very very very inefficient.
Phase change coolers have been in the enthusiast market for a while. But they are completely different
And pretty expensive and dangerous if you have no idea what you are doing as they use gases under pressure.