Getting eight feature-length telefilms with roughly two hours of bonus material for each one ... that's like $12.50 per episode at retail. But if that's still too expensive:

1) Like Ronnie Mervis the diamond importer says, "Nobody pays retail, why should you." Amazon's opening week on Vol. 1 was 48% off the MSRP.

2) If that's still too much, rent it. How many times will you really watch them anyway? Enough to justify the cost of purchasing the set? Or will you fare better by renting? Especially from flat-rate Netflix?