after a lifetime of trap i can tell you you'll own several guns over your 'career' in trap.
I would suggest a semi suto of Beretta or Remington quality trap model.
that way you can shoot doubles as well..
very few shooters shoot an o/u for singles as there is a lot of barrel in the way of your under gun vision-althoiugh it sounds like a great deal.

OR buy a nice used BT99 and THEN if the bug bites for doubles, then a second gun..
if you buy a good used BT99 it will always be worth what you paid for it. unlike one of the thousand lesser quality guns now availalbe.
you will get as many opinions as shooters you ask but i've seen it lots ofr times.
good luck
Larry
also if sporting clays is a possibility, a trap gun is really not suitable ,, so buy a good sporting clay O/U and use it for both.
if you get more serious about one or the other, go from there.
again, used guns are the way to go.