A good turntable is a mechanical investment that should last you decades. You want a heavy platter and a solid tonearm so your records don't skip or wear down. Buying a cheap plastic player now usually means buying a real one in two years when you realize your ears deserve better.
New models usually drop in the spring, which makes holiday sales at specialty shops the best time to grab last year's tech. The internal components rarely change much between versions. You can get a $700 machine for less, or use a window of no interest to make a high-end deck fit your monthly budget.
The 0% intro APR for 15 months on purchases and balance transfers isn't a gift; it is a deadline. If you still have a balance after 15 months, the standard variable APR kicks in on whatever is left. Pay at least $46.67 every month to make sure you finish on time.