Shannons quotes

[2011G6E]

EDIT: Juts noticed there's another thread about Shannons, but it's been locked. This one isn't accusing them of anything, just wondered if anyone else has tried to do an online quote.

Has anyone else tried to do a Shannons online quote lately?
I decided to do one for our 1982 Celica, as we only use it maybe once a week, sometimes only a couple of times a month, so perhaps a more "specialist" insurance might be better than the "normal" Allianz one we have for it and the G6E.

I went through and did the online quote, and then hit a snag when I got to the end. I put down a figure for "sum insured", and put down what I considered a reasonable sum...$8000. I mean, it's literally like new, it only has 140,000km on it, and only a couple of mods, but otherwise it's in outstanding condition for an '82 Celica. When I got to the end, it said that was too high an amount. I had to keep going back until I got down to a figure of $5000, and then it would let me do a quote.
I said usage was only a few times a month.
Then, after putting in that value which I consider way too low for the standard of the car, I entered our no claim bonus discount (got off the paperwork from Allianz) of 60%, I still came out with a premium of over a hundred bucks more than we pay at Allianz for full comprehensive, being able to use the car every day (about $460 compared to $340 with Allianz).

Do people with more experience dealing with Shannons think I could get a better deal if I just rang them and did a quote over the phone? Or would the end result still be pretty much what the online quote is?