so the picture is of a lathe you own and want to sell?
A price would be what anyone is willing to pay for it, Given its location there will be very little interest outside of your country. The particular maker of your Lathe is a highly respected manufacturer of lathes at the top end of the market
It's a fairly nice small machine for it's age but sadly they are not the most sought-after nor valuable model of Smart & Brown. I would put it's value, around my area of the UK, at about £600.
Apart from that, the forum rules do not allow you to sell it here at this time.
I think your Lathe might be a Smart and Brown MK2 Model A, heres a link you can check out some pics and details and they might help with your sale. It could have started life as early as 1958 but its likely, yours will be a few years later.