Be careful about the Criterion price!
Since Criterion announced the release of I Married a Witch, there has been a lot of confusion about the disc's retail price.
Criterion -- which presumably knows how much it's selling it for -- lists the retail prices of the DVD at $19.99 and the Blu-ray at $29.99 -- each $10 under the usual Criterion retail cost, though there have been other discs priced at that level, such as the recent releases of Jubal and Gate of Hell.
However, some sites list the DVD and Blu at $29.99 and $39.99 retail, respectively -- the normal Criterion price, but incorrect here. They then "discount" the discs to prices about four or five dollars higher than the full retail.
Classicflix and Movies Unlimited list them at the higher prices, while Amazon has it right. I haven't seen others, and some sites still don't have the title listed yet.
Hopefully everyone will get on the same page at some point, but as of this date (7/19/13) before pre-ordering be sure you check around and get the correct price.