Depends on what you buy - like most of the dealers, he sells a fair amount of low-end stuff, but he doesn't do much in the way of street junk. He also sells a lot of the higher-end reps too. He's good for some of the less-common watches - I've had a couple from him that are tough to find elsewhere.
Most of what I've had from him could be described as "mid-range' stuff, and it's been fine, but I took my time making sure I knew what I was buying. If you're going to buy cheapies, though, be careful (this applies whatever the dealer), there are some really nice watches to be found for under $100, but also a lot that ain't worth having. You need to be fairly selective if you want to get something good.
If in doubt, post a photo of what you're thinking of buying - maybe someone else here has had the same watch and will be able to advise.