From my 15 years experience of owning KTM's I'd say they're just as reliable as any Jap bikes. They just need more maintenance but on the upside genuine pares are often half the price of Jap parts ..............
Can you give us the exact dimensions please and any other information. How many litres does it hold, what materials are used in the construction of said top box , does it have a warranty period ?
Well a lot depends on hiow many bedrooms and location of course but the one we looked at recently was priced at £450,000 but sold for £505,000
https://www.dwsmithandco.co.uk/properties-for-sale/property/11879165-kingsway-st-george-bristol