some of the B owners do not consider the Rialta a "true B". it has all the features of a B, head/shower ( ext too) galley furnace, hot water etc etc.
when I was shopping last year I considered Rialtas.
there are 4 floor plans which differ is bed lay out, seating and galley- there is a great rialta owners website ( google) with tips and tricks and common complaints.
as I recall the 2001 started a more powerful motor- even so all years will cruise interstate speeds and deliver mpg around 16~18 on the flat.
I do see them slowing on the grades.
As a VW you expect pretty easy parts and service- there are no mysteries with VW.
the cab's plastic interior trim and dash may be the weakest point
the head is genius and takes up no room when not in use.
the Rialta is better for under 6' ( I'm 6'2" and considered being ok with stooping- I have lived in boats)
there is a rialta specialist dealer around redlands, CA- their website can be good for info and typical parts etc etc
youtube has some great videos from users incl a family of 4 who live full time in one
the one you are looking at is early so less powerful ( 160hp?).
the rear table folds into wall and the bed is a sideways sleeper.
the 2nd row seats convert into a (twin)- good for kids.
I think that model has a 3.0 fridge, 2 burners, microwave and 2 sinks ( 1 in the head)- the pass seat swivels around so that some of the cab space can be used when parked.
most B's have a 2.8 onan- they are noisy but work...be aware that 2.8 is at sea level...power drops at elevation
it will also have capability to run stuff on LPG, 12 volt or shore power
as for pricing-- I dunno...the ones I saw here were mostly desert mobiles- which are all rust free ( you can eat off the chassis) but the rubber takes the hit
in the end I went with a Pleasureway Lexor TD...tall enough for me, bed long enough and on a chev 3500 chassis- I have GM's so no suprises. the 6.0 gives 16 MPG at 65 MPH and is well sized, tranny well matched to the weight
Good Luck!
Mike