try www.ashford.com The prices are not cheap, but you can earn a slew of miles. I think Continental is 5 miles per dollar. I bought something a couple of years ago at 10 miles per dollar and the miles posted promptly. NW is 2 miles per dollar and $20 off orders over $199, harldy worth it for your ring. Don't know of other partners although they may exist. Check the nontravel shopping partners of each airline.

And while this doesn't solve your liquidity problem, at least you will get some miles and your pay off some idea and then transfer to a zero balance makes sense. Be careful, at 18% per year, $3000 in debt still costs $270 in interest if it takes six months to get the balance onto a low intersest card.

Otoh, welcome to the married world where you will be in debt forever anyway (surely through none of your own fault) and if you try to buy a cheap ring, you will start out in the doghouse, so you can't do that, can you ????/