Are 340’s rare

With the 340's being hard to come by and expensive, I don't understand why guys want to Bore and stroke them and run the crap out of them. The last 340 block I saw for sale the guy wanted $600 just for the block. I'm not a fan of the 273's either

In the whole scheme of things, if building a half way serous stroker piece, a 600 dollar block is peanuts. I have more than that in my Victor intake and having it ported.
Just saying.
If 600 bucks is gonna kill me, I would have quit racing a million years ago..lol