We pay $8 - $11 a flat for 32 plants at the local high schools. Big ones in single pots are more, like $2 - $3. I've paid $5 for huge, healthy looking ones in big pots that already had small green tomatoes on them. We have about 100 planted. Many of them already had green ones when we planted them, but I'm waiting anxiously for the first ripe one to pick.
Here it is getting pretty late and people are giving them away all over the place. Could have had a couple of hundred more at the school Friday for free, but they were all red ones and I had all I needed. I got two black German heirloom plants free at a plant swap yesterday. Some of the garden centers are marking vegetable plants down to half off this weekend.
Sheila