Very easy, Visa costs 100$
Got visa same day for a 75$ extra fee
List of required documents:
Application letter
Hotel reservation printout
Passport copy
You will have to pay visa fee in the bank which is far away, it took me more than 2 hours return trip.

Blog: vanbestus

Place: Liberia Embassy

Visited: August 17th, 2018

Staticmap?center=9.59879754, 13.65492943&zoom=14&size=400x300&maptype=roadmap&markers=color:red%7ccolor:red%7clabel:c%7c9.59879754, 13

Location: 9.598798, -13.654929