They are simply renamed 8800 GT's.
No they are not.
I believe it's the 240 that is an 8800GT and the 250 is a 9800GTX+
GT 240 is a unique core at 40nm and with DX 10.1 support. It is not a G92 or G94.
These use the venerable G92 core:
8800 GT = 65nm, 112 cores, lower clocks
9800 GT = 65/55nm otherwise same as 8800 GT
8800 GTS 512MB = 65nm 128 cores slightly higher clocks
9800 GTX = 8800 GTS 512MB with even higher clocks
9800 GTX+ = 9800 GTX with even higher clocks and at 55nm
GTS 250 = 9800 GTX+
At least stuff has gotten cheaper. I can remember $350 for an 8800 GTS 512MB. Rebranded or not, being able to buy "the same thing" for 1/3 the price (or 1/6 in the case of this deal) is a good thing no matter how you look at it.
To put this into perspective, here is Intel's naming schemes for the Coer 2 Duo:
E4000 series = 65nm 2MB cache
E6000 series = 65nm 4MB cache
E7000 series = 45nm 3MB cache
E8000 series = 45nm 6MB cache
How much difference does the extra 2MB cache on the CPU make or the extra 16 cores on the graphics card? How much difference does the die shrink make? Is a 2.6GHz E7000 series Core 2 Duo really faster than a 2.6GHz E6000 series? It has a higher number, right? What about all the Xeons? For instance my Xeon E3110 is a straight rebrand of a Core 2 Duo E8400.
Why don't people bitch and moan about Intel's rebranding and renaming stuff even if it is the same thing?
Look, just STOP thinking of the GTS 250 as a rebrand. Think of it as a 200 series card.
slowest
210
220
240
250 <<< OMG look it fits right in!
260
275
280
285
295
fastest
What the fuck is so confusing about that? 250 is faster than 240. 260 is faster than 250. HOLY SHIT Batman!
hmmm... these are refurbs or some other hanky panky?
Limited warranty 3 months for parts and 3 months for labor
Yes, likely "recertified."