Is it gavanealed or galvanized steel? The description doesn't say so.
Can the horses reach the saddles on the racks? If so, they will probably get chewed on.
Have you been to see it and touch it? Pull the mats and poke a screwdriver into the floor boards? Is that the original paint? seems pretty good for a 17 year old trailer. Look for rust along the bottom edge of each inside wall - sometimes you can detect it when looking behind the wheels.
Another thing to "worry" about, is the height of the bottom of the GN deck. You should measure your truck at the rear axle, from ground to the top rail. Then add 7". The bottom edge of the GN deck must be at least that high - WITH THE TRAILER LEVEL. I like to have 7" when the trailer and truck are loaded and hooked up. You don't want to run the trailer at a slant for several reasons. 1 is that it will put too much weight on the rear axle and not be balanced; 2nd is that it isn't good for your horse to ride at a slant.
Price seems awfully high to me. If Im not mistaken, Big Valley is an entry level trailer. For that kind of money I would think you could have a comparable NEW, or at least newer; Ponderosa, Adam, Calico, Corn Pro etc.
A new trailer would already have new paint, tires, floor, brakes, warranty and possibly less headaches.
Nearly all of what I post will be controversial to someone. Believe nothing you read on a chat room, research for yourself and LEARN.
Not in the 42% or the 96%
The Big Valley trailers I've seen have been decent lower-end trailers, but I have to agree with 2bee above: That price is very high for an 18yo version of a trailer that probably would sell for only $7-8K new, at most. However, I also have a little experience with the dealer, and it's likely they will work on you and entertain lower offers. If you are going to visit them anyway, take a look at their new trailers, too; they have some very nice entry-level GNs that are quite affordable.
FWIW, I recently sold a 1989 Wilro (comparable make) 2H straight load GN with a medium-sized dressing room for 2K. Perfect structural condition, new tires, new floor, great mats, perfect electric ... just needed sandblasting, re-caulking and a new paint job.
I like Bee's, well made trailers, balanced, easy to work with/live with.
Don't know Deltas.
Whatever you pick, watch your size- make sure it's long enough for the big horses to deal with. If you've got a pal whose trailer your mares like, size wise, the tapemeasure is your friend and take it with you to the lot. If it's not TOO far to either of DHMCo's lots, or another big trailer dealers place, just go and look and kick tires. We did that a ton while we were shopping, the more you look and touch the more you get an idea what's suitable for you. Example: note how tiny that people door is on that Big Valley- step through it saddle in hand, bang the CRAP out of the cantle and curse it...you'll find yourself wanting roomy doorways
I had a Bee back in the early 90's-gooseneck-extra wide, high, great dressing room. Sold to a local rider about 6 yrs ago. Still looks great and is pulling well. They are heavier than an aluminum, but the do last.
Everybody loves their Bees! Can't find them used for love or money.
Another make in that same price range that is pretty good for the money is Adam. I have a little 2H slant GN about 11 years old that is a great little workhorse. I know several other people who have them and are quite happy with them.