I had a go at selling hives this last year and have been selling 4 frame nucs for $120 and I sold a ten frame double super hive for $300, I think any thing less than that and you are under selling yourself.
I had no troouble selling the nucs on Gumtree, Also the $120 was without the box, that was frames and bees only.
I would potentially make the ply wood 5 frames and sell them for $140 including the box for this season coming.
Good luck you should do fine, You may find that you have a slow time until spring comes.
Nick