Jayco is the company that created this particular a-frame but there are many other companies that make similar ones. They only made this trailer for a little over a year so you can't get one new anymore. The components are largely the same between the companies that make these type of trailers and are mostly interchangeable, so having a discontinued trailer is not a big issue.
I think it retailed for around $15,000 US dollars when new.
You really could live in this camper trailer pretty comfortably if you wanted. The big nice window is what I like the best.
Full specs are here: jayco 12bsb
Video on a similar trailer (but mine has a toilet and shower) is here:
after I saw his vidio footage was very comfortable living in this camper trailer, because! This camper trailer with the equipment inside is almost complete as we live in our original home. difference [home with trailer] house we can not take it anywhere big enough nyapun size. being a trailer could easily we carry it with a private car. Thanks a lot of dear friends @lightsplasher for very good information.
You are welcome! I hope you can get one if you like. You should check the towing rating on your car to make sure it can tow it though if you do. The first a-frame I owned was a 16' model that was around 1435 pounds dry weight, the Chalet Classic Arrowhead. I towed it with a Subaru Outback with around a 2000 pound towing rating. It did very nicely but that was pushing the engine a bit. With a 19' trailer I think you would want a tow vehicle that can pull more.