RV buying

So I grew up camping with my family. Tent camping and later rv camping. Anyway my boyfriend and I have been talking about buying one in the spring. However we found a great deal on one we both agree on so tomorrow we are making the ride to go look at it and hopefully apply for financing. I have my parents knowledge and my dad has helped me with research on this particular model. However since this is more my thing I feel a lot of the research has come down to me. I was wondering if anyone knew anything about used rvs? Or could just give me some words of wisdom.