Want a phone that has (or will have) Android Jelly Bean? They're still pretty expensive. Looking at rough prices, for unlocked or no-contract devices:
Nexus 4: $300
Nexus 7: $200
Nexus 10: $400
Galaxy S III: $575
Galaxy S II: $420
S Advance: $300
Ace 2: $270
Ace Plus: $222
Galaxy Note: $520
Galaxy Note 2: $710
Galaxy Nexus: $460
Nexus S: $420
One X: $470
One X+: $650
Xperia T: $500
Xperia TX: $480
Xperia V: $500
Droid Razr M:
Razr HD: ?
Razr Maxx HD: ?
Atrix HD: $420
Electrify M:
Xoom: $325
Optimus LTE II: ?
More phones will eventually get the upgrade I'm sure, but right now it looks like the cheapest option is the Nexus 7, though it isn't a phone. At least you'll get all the features of Jelly Bean.