I believe any inexpensive flintlock will be hit-or-miss as far as how well the lock works. I have a Pedersoli Brown Bess, with a lock that works great, but the big Musket locks are harder to screw up, in general, (from a design standpoint) as they are more direct copies of original locks. I had to do some lock tuning, which was well within my shade-tree gunsmith/mechanical aptitude capabilities.
Don't have any knowledge of the Traditions. Did build a GPR kit for a guy once, and that lock actually worked fine. As long as a rifle has a good barrel, is stocked reasonably well, and you like the looks, the lock can be dealt with one way or another. If someone does make replacement locks for the rifle you decide to buy, you are in "like flint", for some additional cost, which will be well worth it. But again, many of those locks can be "fixed", or tuned, by someone who really knows what they are doing.
I think you will be fine as long as you resign yourself ahead of time to possibly having the lock tuned/altered/fixed by a professional who knows flintlocks well, or getting a good quality replacement lock. Resign yourself to the fact that whatever you get, the lock may not work well. That additional cost can be easily covered by putting any spare change, paycheck to paycheck, in a coffee can, eating out less, picking up aluminum cans, mowing lawns, drinking less beer, staying home more, sell something, pick your poison, etc. etc.
