I only foud couriers in the price range of 100-140e? Thats a lot.
If you found some cheaper you could maby recommend.
Usually when im selling something i take care of the shipping and the buyer just pays the fee that I say.
Would you pay 120e for a courier when the bike cost 300gbp? Didnt think that.
If u really wanted to sell and made a small effort you could ship the bike for maby 60gbp.
Easy with the attitude, no wonder this wont sell.
Sorry...in need for cash...