It’s usually going to be cheaper through a shopping service because Qutieland’s service fees are a little higher than a lot of places. It probably won’t be a lot cheaper (because you still have to add the shipping from the TaoBao shop to the shopping service which Qutieland already includes in their prices) but it’s usually a little cheaper.
As for asking them to lower the price on the package, some companies will do that for you. Bodyline actually has an option for it during their checkout. I’ve been told that it’s not actually legal to do that so some places won’t do it but since it’s one of those things where nobody is really going to know if it was marked down or not it probably won’t hurt to ask.
It is a bit of a difficult shade of sax to match. I don’t think it would be much of a problem to use white shoes and white socks. If you felt that it was too much white you could try to find or make shoe clips in the color of the dress to add some interest and incorporate that color. Another thing you could do is add another color. If you were to do pink shoes and add pink accessories as well as blue it would give you a super sweet look. I adore pink and sax together and I think it would be very cute with this dress. Maybe white socks, pink shoes, and then incorporate both into your hair accessory like this or this (obviously not the same color/design of the second one but as a way to set them up.)
If you don’t like either of those options though you can still probably find shoes that are very close in color to the dress. AnTaiNa has a sax that’s pretty close actually if you look here. It’s not exact but it’s much closer than what Bodyline has.
As far as I know it’s closed. They made an anouncement last year saying it would close and they haven’t posted anything else so as far as I know they just haven’t taken it off the main website.
A few Lolita brands have made biscuit bags but I think they’ve all been other shapes. Swimmer made the very popular round biscuit bag that I’ve seen around the comm sales quite a few times. Some TaoBao and Rakuten shops have also made them like this one that’s being sold by a reseller.