yes, this year the greenhouse we usually get our starts from went from four packs to three packs. so instead of getting a flat of 48 onions we had 36. same for tomatoes... i know he's gotta make some $ someways, but it messed up plans somewhat because i had planned for groups of 4 not groups of 3. oh well, we managed.
sorry, can't say anything about prices, usually for our own gardens we used to wait for clearance and late sales so could often get perennial plants for $1 in gallon containers. they might be limping along and looking sad but could often be rescued and would be fine the next season. i'm not much into annuals other than the garden veggies. if it will reseed itself then i'm ok. i'm currently enjoying the turnips and radishes that have reseeded themselves from previous years.
as for places to look, i'm not sure if there are any grain elevators around, but sometimes some of them have plants for sale. call around or search on-line. usually worth a call this is getting a bit late for some plants and you should start to see some hints of sales or be able to talk the price down a bit.
i rarely buy anything from big box stores greenhouses because the plants are usually not treated very well. i'll pay extra to the local greenhouse instead.