The 2nd edition C-ROC expansion will retail for $99.95.
A 1st-edition C-ROC has an MSRP of $69.95 (frequently marked down for less, as it was not a popular ship), and includes an extra Scyk model. You can then buy a Huge Ship Conversion kit for $29.95.
This will save yourself both $0.05 and the cost of buying that extra Scyk model. If you don't have them, you can probably find dials, ship tokens and pilot cards from people who have extras from the conversion kits.