We all know that there are a few quirks with our current Missions guidelines that we'd like to see resolved in the upcoming season. I'd like to suggest looking at the Pathfinder Society (PS) Organized Play model to provide some of these solutions. In particular, buying gear seems to be a common source of tension for players and GMs so maybe we can look to their model for solutions.
1) Gear looted from the Mission. In PS modules, you can pick up and use anything you want during the adventure, but once the adventure has ended, you don't get to keep it. However, you do have the option to buy certain things that are listed on the certificate at the prices shown. For example, you run a Mission and successfully complete it. During the Mission, you encountered a top-tier bodyguard with a fully modded Ares Alpha using APDS rounds. During the Mission, you took him out, scooped up his gun, and used it as your very own. Once the Mission is over, you don't get to automatically keep the gun, but it's shown on the certification with a price of 2,500. At that point, or any point in the future, you can purchase that gun for that price since you've successfully completed the run. This solves the loot/fencing/Monty Haul issues that some organizers are worried about while still giving players a chance to pick up some cool stuff from the run at discounted prices.
2) Purchasing specialty gear. In PS modules, certain stuff is always available for purchase (+1 stuff, 1st level potions, etc.), and other stuff is available as your faction rating increases. This could work the same way in Missions. Some things at a certain price and availability are always available. As your karma rating increases, so does the availability of all gear, but as your rating increases with certain factions, certain gear becomes available more quickly. Once available, you pay for the gear and move on. No availability tests, no waiting weeks for it to come in. You been around enough to know the folks who can get you the gear. Done.
3) Sharing gear. In PS, you can share gear during an adventure, but you can never sell or give your stuff to another player. Period. Players need to be able to show how they bought the gear (i.e., it's listed on a cert for an adventure they played in or it's available due to their experience/faction rating).
They also use a system of "tiers" for their adventures (i.e., you must be a certain level to play in a certain tier of adventure), but I realize that they have a lot more adventure submissions and players than we do. I don't think it would be feasible for SR Missions. Table rating and retirement may be here to stay for us.
Anyway, I've been impressed by their system, and their guidelines are freely available so why not give them a look. I think they're practical, and could be put to good use for SR Missions.