$10,000? I don't think so. Let's look at this again.
Rent 740 points at $10/point = $7400
Pay $3.50/point dues = $2590
Net gain on sale = $4810
Income tax on the gain, assume Federal & State = 34% = $1635
So after tax profit = $3175
Option 1: Current cash price for cruise is $4335. So take your $3175 profit, add $1160 of additional money and buy the cruise. Total cost to you is $1160 out of pocket, and loss of 740 points. (note dues are not additional as they've already been deducted from the $7400)
Option 2: Don't sell the points but just use them for the cruise? Then total cost to you is the dues you paid of roughly $2590 + $75 fee. Total cost to you is $2665 out of pocket (dues you've paid on those points), and loss of 740 points.
Looks like you would come out ahead about $1500 by renting the points and paying cash.
Also consider the value of the points at
DVC. For 740 points you can get a 1-B/R at OKW mid season for 27 nights (20 weekday, 7 weekend).
Just for comparisons:
Cash for the cruise at $4335 = $619/night
Rent points at $10/pt for the cruise and pay cash = $166/night
Use points for the cruise = $381/night
Use points for a 1-B/R at OKW mid season for 7-night week = $98/night
Note that none of the above considers the initial points purchase into DVC (Thus the big difference between a strictly cash cruise and using points (either directly or via renting them out)). But if you do use points, then the above gives you a relative value based on your total ongoing cost for those points (dues).
Finally, while dividing $4335 by 740 points gives a 'Disney' value of $5.86/point, the true selling price for a point would have to be about $7.00/point in order to 'break even'. This is because of the tax implication.
That is, if you rented 740 points at $7.00 each, your after tax income and dues payment would equal the cash ressie price. Thus you essentially traded 740 points for a cruise. Use your points directly is the same with the addition of the $75 fee.
Rent points at more than $7.00 and you come out ahead. Rent them for less? Well then you're just better off using them yourself for the cruise.
Not report the income to the IRS? Try to hide an almost $5000 gain? I would hope all DVC'ers are more honest than that.
Note: examples will vary depending on actual dues. I used $3.50/point as an average.
P.S. Sell the points for about $12.35/point, and the cruise is free. That is, you made enough after tax profit to make a cash reservation for the cruise. You traded 740 points and got enough money to pay the dues on those points AND pay cash for the cruise.
Anyway, just playing with numbers for the fun of it.