Here's a little hack I recently used in my stories. When you're ready to raise the price on a valued offer you present to your clients, announce the "Last One to get in at this price" with proof of that purchase. For example "Welcome Stacy to our community, Stacy is the last one to get in our existing pricing before it goes up!" Show Stacy's screenshot proof of purchase for the old price. Then share the link to the new pricing. I guarantee you will have people slide into your DMs saying "OH NO! I missed it! Are you sure you can't give me the old pricing?" I, of course, always do. But I find using this to get those last sales in the door before your price hike always works!