Grove sharpening is something you’ll need to search the Google. That makes them non- conforming.

Between sharpening, getting an opinion to fit you for new shafts, paying to get new shafts and grips, and adjusting loft and lie, you will be investing close to $100 a club. There should be a pro shop near you for that service. But if the groves are worn, might want to consider a new set or keep the current irons as is until you are ready to get a new set. The resale value won’t change much by the investment to update.

IMO, I would get a fitting done at a reputable place first. Then, if you don't want to spend a lot on a new set of irons, I would look on 2nd Swing for a used set in compatible specs. They can even do loft and lie adjustments and replace grips if you want something different. I've bought Vokey wedges, hybrids, fairway woods, and shafts from them. Once you know what specs work well for you it's a great way to save money. Last year I spent over $2k between new T-150s and a new TSR3 driver after being fitted. Bying the aforementioned items used saved me a lot of money and the full bag fitting showed me what would work with my swing.