I don't see it as an ideal place to travel solo if you don't love antiques because it's not exactly a hoppin' town, but for a couple of days it would be absolutely fine as a place to relax too.
New Oxford is a one-horse town in rural Pennsylvania that, as I said, doesn't have the bustle of an urban center. However, considering you could spend HOURS perusing goods from hundreds of dealers you would be quite the busy shopper/browser.
I went with a friend because I'm writing a story for The Washington Post on learning to like, or at least understand, antiques. So I took along a friend who has furnished her house in solid-wood oak pieces, green Depression glass and Watt pottery. (If you don't know what these are you're in the same boat that I started out in. I, at least, have begun to learn how to paddle.)