Melt the 4 Year DF.
Use the credits to upgrade the Black LTI DF to a prospector.
35 credits + 35 DF value = 70
140 prospector price - 70 = 70 left to spend to get the Prospector.
That's not half bad.
That'll leave you with the Beerfarer, Cutty Red, a Prospector and a DF. That's a gorgeous...