Anyone would think that the bike is something special for that price , but......... it isn't. It is a bike with a motor , he must have been trained by Halfrauds.
Someone is having a laugh or simply needs to charge so much due to lack of work and income.
My bikes only real costs in servicing are the odd pair of brake pads replaced , a swap over of chain and very little else bar a wipe over with a rag. One reason why I have a hub bike is because they are ultra reliable and rarely need any maintenance .