Resale value of new speakers

I had a house fire.  I lost a pair of excellent, Sound Lab speakers.  The insurance company has given me an allotment of 24,000 (replacement value) for another pair of speakers.  Given the fire, and current finances, I need that 24,000, but must first buy a new pair of speakers, and then sell them, to get the cash.  The insurance company will only reimburse what I pay out for a pair of speakers, up to 24,000, not give me the cash directly.  I plan to buy a pair, keep them in their original boxes, and then resell them.  My 2 questions are:
1. Where are the best places to post such an offer?
2. What speakers would you recommend, to purchase, that would bring in close to their original cost on resale?
Thanks!