Like Russ5144 say's:-
1-Proton Pack - in the neighborhood of $300 give or take depending on features… a lot of people are complaining that a full pack in that price range is unrealistic & crazy because they spent $1000-$1500 building theirs.
I too, have built a pack, & it cost me around $1500… a lot of that cost was the shipping and paypal percentage fees of each individual part I had to buy on various message boards & ebay from different sellers; Matty won't have to worry about that cost, as they will be producing all parts in house. These parts include clippard valves, hat lights, pneumatic tubing, & spectra strip/ribbon cables, that would all be mass produced in china for pennies.. these are all parts that normally cost builders up to $50 each. Electronics could also be done on the cheap by Matty, while it normally costs builders $200-$300 for a full light & sound kit.
Also, keep in mind that it costs over $500 to build a PKE meter between the shell ($90-$200… yes I've seen pke shells go for over $200) & the electronics ($300-$400).. Matty was able to offer us a good one for $60 (it probably cost them under $10 to make it.. why did they not sell it for $50 then? because they knew they could get $60 out of us, as well they should!)
Anywho, I'm rambling now… so a full pack for around $300, or maybe even just a “Neutrona Wand” for around $50-$100?
2-A Ghost Trap for $50-$100 depending on features.
3-I guess the Goggles, though, I really have no interest in the goggles, so under $50.