Curious as to why you didn't jut say "you can directly buy Dogecoin for $100 USD on a website called Vault of Satoshi." Instead, you opened up your longwinded response with "doing a bit of work" and other mumbo jumbo, leaving the direct answer as a marginal note at the end (just "another option" in your words.)
Edit: the most challenging part would be going to a bank to deposit the physical Franklin, if the end user didn't have a fiat in an account already.
The options are listed in order of increasing difficulty. Vault of Satoshi requires verification of users, which means sending them personal information and waiting for it to be processed. Once you've jumped through all the hoops, it's easy. Finding someone to meet you at the coffee shop and exchange the $100 in person is potentially the quickest and easiest, assuming such persons exist in your area. The PayPal/Wallet option is somewhere in the middle.
All that having been said, _I'm_ a bit curious why you felt the need to bitch about someone giving a detailed answer. I wonder at the intellect that labels four sentences as long-winded.
Edit: the most challenging part would be going to a bank to deposit the physical Franklin, if the end user didn't have a fiat in an account already.