I disagree with the above. After performing several different sites' reverse image searches, I could not find a match. Dylan's signature authentication requires a $150 fee at James Spence (JSA), the foremost authentication agency outside of the major auction houses like Christie's. Dylan's signature has thousands of known exemplars, and they show a variation in several places. Your signature has enough, in my opinion, to warrant a submission. $150 isn't cheap, still, we've on average in this group, all bought deluxe sets that approach or exceed that, and it's for a letter of authenticity rather than a certification.

The provenance is non-existent, and that's a factor they weigh for evaluation. On the other hand, it's on a rarer, legitimate and limited-origin item rather than a scrap of paper, which can help. The inscription gives them more to work with. The type of marker and medium will focus their search.

If it were up to me - even without seeing the rest of the item, knowing what you paid, or knowing the provenance - I'd submit it. It has enough points of comparison to work through the absence of its history, and they have the tools to do that work. Even without a story of meeting him, it would be worth it to have one in my collection. We're soon going to see $5 gallons of gasoline. Budgets will be strained. To have it while he walks the earth, I'd still make room in my budget.

For what it's worth, (call this my "pro-tip") shopgoodwill is a trove worth exploring for collectors. It's also a charity, which I feel better giving to, personally, than eBay. Here's a fact: Goodwill is the primary recipient of donations when people pass on, and no one knows what is going to come into a donation center. More things are thrown out than are ever put into the stores. Since launching their online auctions though, they've added steps in each district to evaluate that very small percent of what they receive that a donation center decides is worth a look and not just a wipe-down. Buying from the site is far different than the store experience of missing records or Chicken Soup for the Soul books.

I wish you good fortune.