Let´s wait what will happen over the next time.
A long time that was the only game in town if you wanted the old E in 1/350 - esspecially if you had the kits of Movie E and the Archer E already and needed it to complete the hattrick. Now people can buy a kit of the old E, too - and modify it to their preferred version and/or standards. Even build it with a higher quality.
Sure, some will always pay for a ready to run display piece, or a signature etc. - but for the general/average price developement we can only guess atm. I assume prices will go noticeable down, first a little bit, than some people gonna start selling theirs to minimize the loss due falling prices. That way more will be available, additional to the new kit, which will bring prices down even more.
Just my guess, but i wouldn´t wonder.