Attached are the sales particuler for this property. the landlord wants 30K PA; which I think it way way too much! But they are open to offers so what do you recon?
A property is worth what someone is willing to pay for it.
As for whether it is 'too much' or not - that depends entirely on what business will be operated there, the expected turnover, costs and profits, which is why it's usual to compile a business plan with details of everything, including multiple versions of possible future cost increases and revenue projections.