I question the $50K valuation also, to me you would seem to be under-insured. Bad deal- here's a scenario: you bend the airplane, then get a quote to repair it for $30K. Not hard to do if you put it up on the nose, requiring a new prop, an engine teardown, maybe a new crank, etc-- plus airframe repairs. So instead of paying $30K to fix it, they pay you off for $50K, then sell the airplane for $25K- saving them $5K. This is the basic concept, only the actual numbers were changed to protect the innocent.
You would be better off over-insuring it to some extent, it'd cost you a bit more money every year but you'd be in way better shape financially should you pile it up. And that's what carrying insurance is all about- it's the biggest waste of money in the world until you need it, then it's worth every penny.
Oh, FWIW, I had my 170 insured for $32K through Travers & Assoc & it cost me about $850/year. My 150/150TD is insured for just a bit more through AOPA for the same cost.
Eric