Definitely list them on our Marketplace.
I've listed and sold stuff quite often on Kijiji (Canadian version of Craigslist). Take a bunch of pictures, be as descriptive and detailed as possible, and list them with the expectation that people will offer lower than what you're asking.
With wheels and tires, the important info I'd list is:
Brand/model of the rim
Brand/model of the tire
Size of the rim (diameter, width, PCD, hub/center bore size, and wheel offset)
Size of the tire (section width/aspect ratio/wheel diameter)
Load rating of the wheel
Load and speed rating of the tire
Length of time on vehicle, amount of treadwear left on tires (preferably measured with a tire gauge)
Age of tires
Condition of rims/tires (scratches/curb marks/cracks/bends on rims, patches/repairs on tires)
Most of this info is found right on the rim or tire. On the rim, it is usually listed on the back of one of the wheel spokes or on a sticker on the inner barrel. On the tire, all the info should be listed on the sidewall.
You'd also want to state whether or not the wheels are OEM or aftermarket - OEM wheels usually use a different type of lugnut.
Its a lot of work and information, but IME, you're more likely to get your asking price. It also cuts down on the "time-wasting" messages from people who want to know things that should already be listed in the ad.
Finally, when meeting up to sell your items, exercise proper social distancing measures, and utilize e-transfers if possible (sanitize the money and your hands afterwards if not). Whenever possible, meet in a public place, like a gas station during the daytime. Gas stations usually have security cameras that can deter would-be thieves/scammers.
I've sold wheels/tires, car parts, aquarium equipment, and most recently, exercise equipment like benches, barbells and adjustable dumbbells on Kijiji, and each sale went off without a hitch. Good luck with the sale!