Puter.com belonged to my good friend (and now also an investor in Puter) Humberto (who is the founder and CEO of Rows.com). He told me about the domain and I immediately thought it would be the perfect fit for this project. He was very gracious and agreed to sell it to me (well, to Puter Technologies Inc. lol). The price was $25,000.
Another comment on here explains it very well: "It’s “pyu-ter”, like comPUTER! Puter dot com! Well done" This is why I loved it so much!
He has more domains available here: https://portotype.com/documents/domains/