I sound like a broken record today, but again go to the "Resources" tab on this page and open the "Saxophone buyers guide".  This is the best all around information you will find.  One thought is to go for a vintage professional horn.  There is a silver Buescher Aristocrat for sale at Saxquest.com that looks to be an excellent possibility.  But I recommend that you read through the article and make your own decision.  I am in no way connected to Saxquest other than being a very satisfied customer.

One more thought.  If you purchase a used horn, I recommend having it fully serviced before sending, even if the horn states that it plays well.  Of course if you purchase a used horn from a dealer that also services horns, this makes it easy.  Even if you buy new, get it at a shop that routinely goes through the horn and sets it up correctly.  The thing you don't want to happen is to send a horn over seas that needs servicing.  That could be expensive and take a lot of time, especially it it is sent back to the U.S. for the service.

Jupiters are essentially Yamaha clones, so if your cousin wants to stay in that general direction a used Yamaha 62 would be a good option.  If you really want new, you could go with a good quality Asian horn like Chateau (sold at Saxquest) or Antigua.  I believe those brands also have store distribution.  If your cousin wants something more Selmer-like there are some good and inexpensive ones available online from Phil Barone (New York) and Kessler (Las Vegas).  I'm sure any of those shops I've mentioned would be glad to help you out.