308 market right now is pretty crappy and a R700, custom or not, isn’t going for over $2000 unless it’s in a JAE, Cadex, or other $1500 chassis.
There’s a Stiller 308 for $1400 on here and my surgeon 308 at $1600. Real hard to move a R700 for north of $2000 unless it’s something rare or an exact clone.