Amazon.com have recently released a list of their 200 top perennial selling DVDs (i.e. DVDs which sell for them year in, year out).
It's a pleasant surprise to see 4 of their top 25 are Britcoms - Love Actually,
Monty Python and the Holy Grail, Fawlty Towers and The Life of Brian.
I must admit didn't realise Fawlty Towers was appreciated stateside!