Holy Price of Audi Oil Filters Batman! Opinions on Mann or Mahle Substitutes

[Glenn Kaufman <gkaufman@ftp.com>]

I was about to buy some new oil filters for my '86 Coupe GT from my Audi
dealer who wanted to charge me about $10 per filter.  Wowww!  Two years ago,
the dealer charged me about $3.50 each for a dozen.  

I've used Fram before,  but they don't have the anti-drain feature.   The
dealer also carried Mann and Mahle filters.  Can anyone fill me in about
these two filters?  Are they any good?  Do they have the anti-drain feature?
Will they let sand through?  Thx.  glenn