Dearest forum ....
I bought a digital back, upgraded with a dealer, got a great trade in price. My job, kids, and shooting interests led me to sell the back with absolutely no hurry.
Tried here for a while, and it didn't sell. Lowered the price, and it didn't sell.
Called one of the big NYC dealers ( not a Phase One specialist ), and got a quote for 75% of retail.
Decided to deal with flea bay, and got almost 20% more than my final offering price on this form.
A P30+ is simply worth more on the open market than to this very friendly group of gear slu...... I expect the same to be true of any sub 60 mpix back. Just no real market here for them.
I'm a big kid, it cost me several grand to play with some really cool toys for over two years .... Great fun. Ever so glad I did it. Met some good people face to face, and some good ones on line.
Compared to Ferraris, or sail boats this is a cheap hobby. Compared to Harleys this is a safe hobby.
I'm not going to defend someone in a sales role who had a bad day, but my personal experience is the two dealer I have dealt with both have pro level staff.
Moral is, abandon hope all ye who enter here.
Hope my little story help the OP decide the best way to unload his back.
Dave