Here, try this

As a premier SRP honemeister, master razor restorer, SRP moderator, SRP newbie mentor and all around looked up to guy, you should see it as your OBLIGATION to have and use a full array of stones in every grit.

1) People are going to ask your opinion on what they should buy. You should have experienced them all.
2) People are going to ask your opinion on how their stone compares to some other. You should have experienced them all.
3) It's going to pay off in your business. "If you own any stones or are considering buying some, let me know. I will hone your razor on the same stones so you can see the results you can expect". You should have them all.
4) more?

Now go forth and purchase!