2001 BMW R1150rt in good condition and low mileage

Tidy 2001 BMW R1150rt with low mileage of 23,000 miles. Few scratches here and there, it is a 25 year old bike but very presentable. Pics are recent. Full luggage, ignition key works panniers too BMW comfort seats Heated grips working Electric screen (tinted) working Tyres approx 60-70% left on them Radio fitted and in working condition Full service (oil, filter, spark plugs, shaft drive oil and cleaned air filter (k&n) carried out less than 1,000 miles ago. brake hose from front master cylinder to split joint for front brakes was leaking so replaced with braided line from the US. ABS bypassed (common issue) Taxed for the year Only issue with bike is battery will go flat when parked for 2 or 3 days. Suspect poss needs a new battery, i have a plug wired to the battery that matches a Oxford optimate trickle charger which i leave on it when parked. Can let charger go with bike is needed. Alot of bike for the money, not playing games by putting it up for more than its worth or adding money on to allow some to knock of, have it priced reasonably so no offers below asking price please.