Entering, will post my design (and prices for all items individually) on this post rather than make a new one. :)
Edit:
Ok I'm not sure if we're allowed to enter more than one each, so here's one I made. :)
Tried to go with a sort of Spring theme, but not sure if it turned out so good. :s
Items used:
Green flats (NPC shop item) 4,119 tu
Blue Fluff Flowers - Current Lowest price 800,000 tu*
Blue Pinwheel Flower - Current Lowest price 1,500 tu
Green Water Flower - Current Lowest Price 100,000 tu
Soft Blue Flower - Current Lowest Price 90,000 tu
Garden Sundress - Current Lowest price 7,000,000 tu
Green Long Embroidered Skirt - (NPC Shop Item) 5,052 tu
Green Loop Lace Collar - (NPC Shop Item) 3,800 tu
Green Loop Lace Wrist Cuffs - (NPC Shop Item) 3,340 tu*
Total tu needed: 8,007,811
Pretty good price I thought! I dunno how pricey you wanted it to be, but I couldn't find any expensive items that really sorta went with this outfit. :) Also, that hair isn't needed to look good with the rest of the avatar; any hair would really do. :3
*Not necessary for outfit!