(or move product_dl_data json to first 16kB)
Currently, the title, keywords, and description are easily retrieved in the meta tags of a marketplace listing, but the price is 52,500 characters down, making it impossible to parse with llHTTPRequest (at the same time, the Range and Content-Range headers are blocked).
Having access to the price will allow a user to paste a listing link, and have the link,name,description,tags,price all available at once for occasional monitoring or occasionally useful use-cases like price-watching/comparison, anonymous gifting (secret santa is my personal use-case), and saving listings into an in-world wishlist, maybe as a piggy bank!
The product_dl_data json data in the inline script around line ~430 has even more information that could be useful, which includes: Modify, Copy, Transfer flags, Land Impact, Land Required, Full/Partial/Non-mesh. Moving that inline script to the first 16kB would be phenomenal.
If somehow trivial, a texture UUID for the listing would be a huge first step into 'marketplace item prims' for in-world purchases of marketplace items.
Even better, for LL and creators, would be a ?json parameter which just gives all salient info via json without having to load the full page.