Dolnet, tenors and altos are very nice and plentiful in Northern Europe so I guess that Sweden is no exception to the rule. A very good example would cost you 500€ to 800€ from a private seller and up to 1000€ from a shop.
If you buy one make sure that you bring a tuner with you, not so much because their intonation is sketchy but rather because I have actually encountered several high pitch horns (A=457 Hz instead of A=440 Hz). there is always the off chance that one of those has made his way to your location.
The best production has pearls on the keyguards instead of red or black beads of glass paste original pads of these early models (the ones with glass paste beads) should be bright red. Their very late production is also shabbier than the '60 , which, in my opinion are the best (difficult to date with any certainty because there are no SN charts, just anecdotical evidence).
If you want a great horn, try to find a Royal Jazz or a M70