I bought 3 passes this year
Diamond Peak pass $358
Epic Tahoe pass $588
Mt Rose pass $633
total of $1,579
I'll get probably 75-80 days total at the resort, so about $20/day on average. If we'd had a better start to the winter, i probably would have been closer to 100 days but it was very depressing for the first couple months.
don't think I'll have purchased any single day tickets but here is what they cost where i ski-
diamond peak: $140-175 depending on weekday/weekend/peak
northstar: $219 midweek, $240 weekend (surely higher during peak periods)
kirkwood: $159 currently
mt rose: $159-169
as far as i can tell, the resorts are trying to encourage people to buy season passes as opposed to showing up to buy day tickets. i think they like to get some of that revenue during the summer/fall when passes are on sale and then get all that winter revenue for lessons, food/beverage, etc. they're happy to sell day tickets for $150-300 if that's what works for the occasional guest but obviously if you're going more than 4-5 times in a season, buying a pass is almost certainly a better deal.