Too late to be helpful to the OP, but a bottle of the house amaro at The Abruzzi (P.zza Santi Apostoli, close to the P.zza Venezia and right by a stop for the 64 and 40 buses) is worth the 15 euro price. I am a fan of amari, and this is my favorite. Outside the Abruzzi region, I don't know of another source for it. Also, the green sambuca there (to me a cross between sambuca and green chartreuse) is unique in Rome to this restaurant and costs the same amount. BTW: If you have dinner there, they often bring the bottles and glasses to the table and it is knock yourself out, literally.