If you don’t know….ask. Simple advice and the best.  The principle of Ockham’s Razor points out that the simplest answer is more often than not correct one. It gives precedence to simplicity. If you have no idea  what your banknotes are worth, seek to have them valued. I am always happy to do this – it’s a free service that will cost ony an email and/or a phone call. Keep it simple. Ask and ye shall find!