If there is any average selling price requirement for TRS, I am also not aware of it. My ASP was over $100 (it was $417) when I became TRS but I am sure that it played no role.
I am sure also, though, that the sums you bring into Fiverr overall will have an impact since TRS is a grade that is hand-selected by Fiverr staff. I.e. you can satisfy all the stated requirements but not get the badge for reasons Fiverr will keep to themselves, so they do a manual check and decide who fits.
From reading between the lines of my discussions with senior Fiverr personnel, they will be looking at factors such as consistency, communications, etc as well as that you meet all the identified criteria given in the seller levels requirements list, and that you bring in the money (generally).
It is possible for you to bring more overall funding into Fiverr than I do. My $1000 gig takes me 3-4 solid (long) days to complete. In that time, you could have completed goodness knows how many orders at lower spend levels, so while overall revenues are likely to have some impact, the average selling price isn’t a decider in my view.
I do know that Fiverr personnel look very hard, especially, at your customer communications when they are considering you for TRS, and they are interested to see how you service your customers and how consistent you are–treating buyers fairly, delivering to the buyer’s delight, and so on.
Good luck, freakyyi!