I try to stay under the $500 mark any time I upgrade, but I did have a pair of 7900 GTXs a decade ago that were $500 a piece. As awesome as they were they were quickly eclipsed by the 8800 GTX and I felt like it was a waste to spend that much on GPUs at the time. My former GTX 780 Ti was $530, but I got Watch Dogs free with it and sold my key for $40, so I consider the cost of that card only $490.
Are you parting with that for pascal?
I used one of those inflation calculators, this is what that upgrade cost in 2015 dollars,
$3,145 of 1993 dollars would be worth: $5,215.59 in 2015
And this is what the computer system would cost,
$7,000 of 1993 dollars would be worth: $11,608.62 in 2015