A massive sale recently started (yesterday, I think) at Shout!
Some examples:
Season 13 Blu-rays: usually $79.98 on sale for $49.99
Season 13 DVDs: usually $69.98 on sale for $39.99
Volume XXI - Gamera DVDs: usually $59.97 on sale for $39.99
A few other volumes ranging from $14.99 to $29.99.
Some individual episodes as low as $3.99.
And FREE shipping.
It is here: https://shoutfactory.com/collections/mystery-science-theater-3000
I'm quite pleased I held off a bit on getting Season 13, as I saved $30 on it.