do a search for "Sandpiper 2002 f38 by Forest River" that link should show up. try the NADA guides, don't trust any trailer weights you see. if you need to, have the seller weigh it for you and go with them to a certified scale.
2007 Chevy 2500HD CC
2010 V-Lite 30WRLTS
Nights Camped 2011 -64
Nights Camped 2012 -50
"I Live in My Own World, But It's OK. They Know Me"