Is this a good deal why or why not?

Http://iphone.jimburkeautomotive.net/used/Ford/2007-Ford-Explorer-5897b7920a0a0064003abba030deb8cd.htm

Also it is a wholesale vehicle and what are common problems with these suv?

That mileage combined with that model year seem awfully low. Do some tire kicking make sure nothing is shot. If it is a clean car, not a lemon, go for it! The retail value is $9, 761 (at a dealership). Common problems are tire blow-outs and other minor mechanical problems. (I assume the tires have been replaced though.) Hey, I would say go for it if it's not a lemon!

Always double check prices with other sources like Edmunds.com or Cars.com, compare the vehicle with others that are being sold. Personally, I dislike Fords because they have a horrible reputation for being garbage, and it kind of sucks because it's not even a 4WD. But according to price checking sites that is a very fair price for the Explorer. Check to see when the oil was last changed, check all the fluid levels, find out how new the tires are, when they were last rotated, etc. Ask about whether regular maintenance was kept up on it, make sure the vehicle is clean and it runs right - no pulling, no stalling, no noises. Apparently you can expect transmission problems with the 07 Explorer, I found a site that keeps track of complaints on vehicles for each model and year, so I'll just leave the link here.