He's limped on and off for various reasons. One of which was one time a portion of one of his pads got ripped off. It healed really quick that time, and that was a flesh wound.
This time he's been limping for approx 3 or 4 days. Keep in mind he's 9 months old, so maybe it's growing pains? My girlfriend's mom says 90% of the time a vet will tell you there's really nothing to do for it but give it time. She also said that a lot of times they fake it, but this time it's definitely not fake.
As far as the cost of X-Rays, it cost 400 Euros for 2 photos last time I needed it done on his mother, Sara. At this point it's literally cheaper to put him to sleep, lol. Obviously I won't do that, but it's a bit ridiculous.