I went in 2012 after having worked on the winning side in a swing state. IIRC, we paid something on the order of $150 a ticket.
The experience was meh. It was cool to go to a fancy grown up party with the POTUS stopping in but....considering the high entrance fee, I would have expected more than an overpriced cash bar and Chex party mix as the only available food.
Fun story: a fellow co-worker I knew from the campaign eventually got disgusted by the high drink prices and lifted an entire bottle from one of the bars when the bartender wasn't looking. He secreted it in a jacket pocket and kept drinks topped off for the rest of the night with his illicit booty.
It was fun seeing friends and colleagues from the campaign - and a nice triumphal note to the whole campaign experience - but not something I'd repeat unless I got comped tickets to some super VIP area.