In the past, Tesla has offered certain, unadvertised incentives at quarter end. The information is public, but not widely disseminated. We're in the midst of a major health and economic crisis, and I'm reading elsewhere on this forum that some buyers are thinking about cancelling or postponing their orders. I don't want to speculate how or if Tesla reacts to this, but I would like to find out if something comes along.
The only way, other than you signing up for one of the aggregator sites that shows inventory cars for sale, is to work directly with a sales associate in a store who you convince to check for you (like a traditional dealership salesperson would). Since tesla does not pay direct commission, its much harder to find someone who will do this for you. You are going to have to make a social connection with someone and convince them that you are worth doing that extra work for, since there is no real reason for them to want to do it.
Like going down to a store, getting an experienced salesperson in person and telling them what you are looking for, convincing them to look for you frequently and update you if they see something.
Thats the only way I am aware of.
Tesla incentives that are NOT on demo cars tend to run things like a free upgrade on wheels, and / or No charge for paint. Its possible that tesla sales soften like other car manufacturers.... but if you look at car sales last year, in the sedan market that tesla is in, everyone BUT them had huge downturns.
If one has been trained that they "must have a deal", then you are going to need to do the entire process like an old school car purchase, with the difference being that the "salesperson" doesnt have a lot of incentive other than hitting his sales goals to actually do this work for you, so must be convinced to do so.