I think Christmas episodes were better "back in the day;" while they had the set decorated for a couple of weeks, the only real "Christmas episode" was on Christmas Eve (or, I think, in some years on Christmas Day itself); the first item up for bids was always a Christmas tree, and the second showcase usually included a really expensive item. Pretty much the last time the show offered an airplane (not a microlight, but one where you needed a license) was on Christmas Eve in (I think) 1981. (I say "pretty much" because TPIR wasn't on where I live from mid-1982 until the fall of 1991. You don't see them today because the cost of liability insurance on the manufacturers is passed onto the buyers; a $32,000 plane in 1981 now costs something like $320,000.)