The funny thing about points is that their marginal value increases as their collective value does at the same time.
For example, 10,000 points by itself can be sneezed at, but if you were 10,000 points short of something, then 10,000 points become much more valuable. Similarly, 100,000 points is nice, but not great by itself. However, if you had 150,000 or more points already (just saying for example, this is not accurate), 100,000 points on top of that is more valuable. Of course, many of us use this argument to similarly justify why "keeping at it" in the miles game is a good idea (provided you set your game plan from the outset).
[Aside: reminds you of the Russian joke... "What is relativity theory?" "Well, five hairs on your head is relatively few, but five hairs in your soup is relatively a lot."]
In any case, this sale is clearly against the T&Cs, so good luck to the bidder and the winner; hope they see to it they get caught (of course, eBay is likely immune in this case even though they like to assume some responsibility in eliminating items which they believe are against their rules / can't be traded legally).