Mod my Rega P5 OR...time to move on ??

Just an update here.
I`ve added a Groovetracer Acrylic Platter with some very nice results, I like it much better than the glass/felt setup.
I also have an SRM Silent Base on the way.

BUT...Now I`m circling a brand new Rega RP10 with the Apheta 2 and I have a question for the members here:
If I decide to sell the Rega Apheta 2  brand new and unused what would be a reasonable asking price ??  
Because I have the feeling the Apheta isn`t in the same league as the ZYX I`m using right now.

Expect no more than 70% of cost of new Apheta (including discount when bought with table) if you try to sell.  With the Apheta there is no alignment to be set; will you need spacers with the ZYX?  The Apheta is a decent cartridge.  You can also buy the RP10 new w/o cartridge, save you some $$$.

I`ve started a new thread on the subject to get some other`s opinions on this.
Thanks Guys

UPDATE....
I added an SRM Silent Base a few months back and from getting the motor detached from the plinth and using the stainless 'cones' there was a nice drop in noise. 
I`d guess about 30% of what the Groovetracer subplatter did in that regard.

Up until till now, the Groovetracer Reference subplatter was the single most noticeable improvement made (besides cartridge) it really is amazing what it did to lower the noise.

Well, I pulled the Rega RB700 tonearm with its Groovetracer counter weight off and put on a new Origin Live Silver.
The Rega arm is nice but the Origin Live is amazing....

Right away it sounds really good and should improve once the wires season/settle in.....Very happy that I made the change !