Probably the few times a 400w medium pressure MV went up on eBay for a price that I could afford and ended up not getting. As for Restore stuff, the GTE Sylvania 400w T16 clear mercury lamp for $20 comes to mind.
That and the rest of the 175w and 250w 1960s clear GE Bonusline MVs from
this lot that I left at the Restore. Of course they were gone the next time I went D'oh. At least I picked up one of each wattage.
The other was probably the one and only time I saw a 4ft louvered fixture at the Restore I decided not to get it. Been looking for another once since.