Naw, I'd rather El Degas stay rather obscure and the prices stay down... I don't thing the values will ever get too far-fetched. They were brought out as a low-cost alternative / knock off of the big two.
Other brands such as Greco and Burny really have taken off with the collectors, but I'd rather El Degas stay a more "working-man's" brand
Magnif, welcome. As to your questions, these guitars are sort-of rare, but not in a 10-times-the-original-value kind of way. Looks like you've gotten yourself a nice little El Degas - the jury's still out on the exact nomenclature of that model - it's sort of a copy of an Alembic, sort of a copy of an Ibanez Artist... You paid a decent price for it. The bolt on El Degas guitars tend to go for approx $100-250 depending on features and condition, sometimes more and sometimes less.
The history of this brand is sketchy at best. El Degas started as a MIJ import brand by B&J music of NY, NY. El Degas models were made in most, if not all, the major factories (i.e. Fuji Gen, Matsumoku, etc) in Japan to some capacity throughout the late 60s - early 80s era. At some point of the history, B&J Music was sold to Kaman music; and production moved (all or in part) to Korea and other countries (not sure if those two events coincide). Looks like they stopped being made sometime in the early 80s.
Hope this is helpful.