I'd be a bit wary of "eccentric" or seemingly "penny-pinching" sellers as, in my experience they can be unpredictable...which is the last thing you need when all your plans and expenses are geared towards moving in to their house.
We put an offer in on a house to find they insisted on all fixtures (white goods , curtains, light fittings) not being included...fair enough but they list extended to two cheap filthy dustbins that should have been taken away with the rubbish!
We agreed amending the agreement so they left all the "curtains" behind - only to find that only one set of curtains were left because the rest were roman blinds which stated were not covered by the agreement as they were blinds not curtains! - We were going to chuck the damn things anyway and only needed them for privacy for a few months but the meanness of this was a warning.
Sure enough the seller pulled out two weeks before completion, leaving us with all the expense of surveys etc and put us back months in the moving process...
Unpredictability is bad enough but if they want to save a few pounds on fittings what would they do if someone made them a £1000 beter offer on the price? Guzump you? Why not if they're mean enough? Your time and money being not at all important to them.
Ideally a house sale is between tow reasonable and give-and-take parties - so be wary if it's not!