Domain Hacks have Value?

What is the true value of a domain hack? I’ve seen some sell for pretty big numbers, but it doesn’t seam like very many. Never owned one and not really sure if they are worth investing in or not… Do you like domain hacks? If so, why? Because it looks cool or because there is a potential end user out there to buy it?

Till date I have been investing in .coms mostly. But as you mentioned using domain hack, it is possible to get dictionary word domain easily. This is cool and I will give it a try to find some domains.