On the RARE topic, I love when posts are "OMG SUPER ULTRA RARE SUPER MARIO BROS DUCK HUNT RARE NES 8BIT GAME" and sell it for $1.
On price gouging, I am in high school, I brought my GBA SP with a copy of SMB Deluxe in and was plaing it in one of my classes, someone commented, "Wow, a Game Boy, that thing is so old it must be worth hundreds of dollars." He was a bit dumbfounded when I said it was worth $40 at the most. Some people just think because it is old it is pricy. Some people think stuff that is worth a bit is worthless, there was this kid i kinda hated in one of my classes, He had a SNES with some games, He sold me Super Mario Kart, Mario Paint and Super Mario World, all but SMW in very good condition, for $10. After the sale he kinda acted like he ripped me off.
