I've heard nothing but good reviews of PPL. Can't say the same for Lazy Days.
A friend just sold her 5th wheel through consignment at a local dealer. She said it was pain free and she was glad she didn't have to deal with people coming to look at it if she tried to sell it. It took about a year to sell it.
Make sure you get everything in writing, their commision and marketing plan. How are they going to sell it...ads on cable, craigslist, RV Trader ...etc. Or do they plan to just let it sit on their lot.