Muppet DVD/Blu-Ray Prices

[Muppet Master]

With all the muppet productions on DVD and Blu-Ray I was just wondering if we all think the current release prices are reasonable or if they should be decreased or increased. Here are the current prices for the muppet movies from Amazon.
Prices
(DVD;2005) The Muppet Movie $15.99
(DVD;2005) The Great Muppet Caper $8.49
(DVD;2001) The Muppets Take Manhattan $4.99
(DVD;2005) The Muppet Christmas Carol $13.96
(DVD;2005) Muppet Treasure Island $9.15
(DVD;1999/2005) Muppets From Space $5.48
(DVD;2012) The Muppets (2011) $11.92
and some other titles before we go on to the Blu-Rays

(DVD;2005;2007;2008) The Muppet Show Season 1,2, and 3 $18.89 (individually)
(DVD; 2005) The Muppets' Wizard of Oz $8.95
(DVD;2010) It's a Very Merry Muppet Christmas Movie $8.93

and here are the Blu-Rays

(Blu-Ray;2013) The Muppet Movie $16.98
(Blu-Ray;2013) The Great Muppet Caper/Muppet Treasure Island $18.84
(Blu-Ray;2011) The Muppets Take Manhattan $11.81
(Blu-Ray;2012) The Muppet Christmas Carol $19.96
(Blu-Ray;2011) Muppets From Space $9.30
(Blu-Ray;2012) The Muppets (2011) $13.98

Personally I think the TMM DVD is too over-priced. I think $9 for one DVD is reasonable, but anything over $13ish for 15+ year old movies is too much. The Columbia-TriStar ones (MFS and MTM) are like 5 bucks on DVD which is pretty neat. So, what do you think?