People used to say this all the time when skins first appeared, then chilled, now I get to see it one more time...and it's annoying because of a few reasons.
1) You don't know what 250 bucks mean to that guy. Sure, he asked where to get it cheap from, and maybe this isn't applicable in this scenario, but there are a couple more reasons.
2) You don't know how he got those 250 bucks in his Steam wallet (maybe lucky case openings). Since they cannot be transformed into 'real' money (not that easy anyway), he will probably end up spending them on Steam anyway.
3) You don't know if he wants to play other games or not...maybe CSGO is all he plays...
I go to movies, and an IMAX ticket in the opening week is just under 10 bucks; going with the wife I spend 20 bucks on tickets alone...paying for overpriced popcorn and water/soda will get you spending at least another 5 bucks. So in 10 movies, you spend the same amount in 'pixels' and yeah...corn.
That being said, I wouldn't buy that skin either, but he's free to do whatevs.