Cheapest I have seen (new) is a plain one at Dick's for $206.
just saw it for 179 at Cdnn SportsCdnn sports has them for 189, and free shipping some times. A transfer is 15 or 20 and no tax.
Keep in mind that if it's a project gun, you might be better off just buying a plain receiver and then adding the parts you want. I did like you and by the time I was done literally the only thing remaining from the original rifle was the trigger assembly. Even the hammer and springs were swapped out.
A plain jane is what I'm looking for for the reasons you stated
Because you're going to replace everything in it and want to build a second plain jane with the leftover parts when you're done?
Here's how mine ended up after I was done:
wow that is sharp