[humanpuff69]

Great point for domain owners, some people offered me that they will point their domain to an ip address which I give them and I can use the domain for my purpose. This kind of offers may backfire you in case your website gets lot of traffic. Another one is early post for domain websites, they give you temporary ownership and can take over the domain later. I don't like purchasing domains from webhosts which are less popular. Purchasing both domain and hosting from same company is a bad idea.
Another thing is first year domain price, some cheap domains cost you very less for first year and second year the price will be huge.
I had a bad experience from hloxindia, a domain registrar who gave offer for 1st year, and blocked me from transferring the domain to a less costly registrar. I never purchased anything from them later. It was a good domain name.

if im not wrong 1&1 offer .com domain for $2 but the renewal rate is $20/year (.com domain normally sold around ~$8)

and it is a bad idea espescially when the domain is locked to the hosting . you are forced to use the hosting because of the domain . but if it isnt locked it is fine . my friend bought a domain+hosting package but it isnt locked and can change the nameserver etc and the billing is different so you can pay for domain only