Here is my model available for sale: http://forum.numer.ai/t/marketplace-jackerparker4-model-for-sale
And here are my thoughts about “Community Marketplace-Current Off Platform”. The main issue now for prediction sellers and buyers is the lack of a summary dashboard about the available predictions and not the lack of platforms for selling the predictions. There are multiple ways to sell digital goods for both fiat (gumroad, paddle, etc.) and crypto. A new marketplace platform will require extensive work to deal with tax regulation (VAT for different countries and US states), payment workflows, fraud protection and security of the website which are all already resolved in existing solutions.
My proposal is simple and solves only the dashboard part. We can use some specific format for text added to the bio field of models available for sale: “mrkt;price_for_month;link_to_the_marketplace_of_your_choice;round_when_model_was_started;”, for example. And this text can be parsed by simple script using numerapi to get all available models with prices, while all additional info like ranks, NMR staked, etc can be configured in this script. This table can be generated weekly and placed somewhere on google drive or something like that.
Here is an example of the final table. I’ve generated this table only for ROUNDS 263+, because my model was started at round 263. So, DO NOT USE it to make decisions on which model you should buy 
. Also, I know there are some extra people who are strong participants and are selling models like Arbitrage, Liz and Nyuton, but I just have no info about which models should be included here. Thus, again, DO NOT USE this table and make your own research on the best model which you can buy.
Regards,
Mark