Looking to buy, but don't have much knowledge

for any hybrid that old, brand won't matter much. how it was cared for by previous owners will be more important.

EVERY brand of hybrid has its lovers and haters. ALL brands of hybrids have lemons.

the difference in quality and fit/finish of hybrids isn't that much.
some have slightly cheaper materials for weight savings. some have slightly better amenities.
at the price point that hybrids sell at, there's not much that they can vary at.

as was said, Roo and Jayco have been the best selling hybrid for years. we've had our Roo for over 7 years now and have had few issues with it.
Aerolite had problems with the Thermarest tent ends they had for a few years. R-Vision is no more and will have no factory support.

it's a good idea to post what you'll be towing with.

We made the jump to a hybrid after a few years of a pop-up, too. We were really happy with the extra space, less set up time, and having a bathroom on board. We were really disappointed that it basically dissolved after only five years of extremely careful ownership.

On ours, the downfall was warped bunkend doors that allowed lots of water to enter.

After owning several popups over 2 decades, we made the leap 3 yrs ago to a 2001 rockwood roo 21 ft. Liked the trailer, hated the climb over the dinette with sleeping kids to get in/out of the front bed. So we 'upgraded' to a 2004 jayco 23 ft D model that has a smaller dinette off to the side. Really good experiences with both trailers good luck. Agree with the above poster even the smaller trailers seem significant heavier (plus pulling a parachute) as compared with tent trailers so get a good tow vehicle and add 20% for all the extra junk you will end up taking.

The place to start is your tow vehicle. A full body trailer has much more air resistance than a popup and is heavier as well. Your maximum towing capacity minus 1000 (or better yet 2000) pounds is all the bigger trailer you should pull. Unless you're driving a diesel pickup this will limit your choices more than price.

-- Chuck

Older models are more apt to have water leaks issues around the bunk doors, do go over it very carefully. Check both the roof and the floors for soft areas. I'd think in general you have to go over any 12 year old trailer with a fine tooth comb. Neither of the 2 brands you mention were big sellers so not well known.

The two most popular seems to be Jayco and ROO. I have heard pros and cons about all of them. I would look for the one that fits my needs the most and proceed from there. We have a ROO and are perfectly satisfied with it. Everyone will like their brand the best.