Playing Secret Shop Bingo

Is the cost of playing one board so far the same this go around for everyone? I feel it's costing me more than before. Almost done with my 4th board and I've only seen low crystal options like 50, 100 and 200 once or twice. I've mainly been buying 250 or 260 crystal the whole time. Aren't the awards shown under the "item list", and weren't they're more of those low crystals in previous BF/Anniv.?