I agree with Jared's assessment, but I sell Ideal chrome top mechs all the time for $250 (not $200), and I can't keep them in stock.
I've owned both sliders as well, and Pepsi 55's are a tougher sell for me in my part of the country (Michigan).
I've been able able to sell 7-up sliders very quickly (both embossed and non-embossed), or at least faster than the Pepsi's.
Orange Crush 55's...well that's a different story!
They sell themselves!