Digca.com is a sweet 5 letter brandable. I would say your floor price or minimum should be around $3,000 USD and I literally would price it at $20,000 USD. If you don't mind holding on to it for another 3 to 5 years.
The word digca has no real meaning so it could be a brand, just like Gucci, Aflac, Alcoa, Bosch and Baidu.
Here are some comparable five letter domain name sales, ending in "ca":