Okay, I'm not Angie! But.. I come across these dress styles frequently on eBay, and, believe it or not, Goodwill. I have gotten some beautiful, pristine dresses from both places, for under ten bucks (although the shipping via eBay adds to the cost) So if you want to buy very similar styles with a thrifty budget - it is very possible.
However... since you point out, very reasonably, that you want something for your more casual, real-life, here are some ideas:
1. Skirt + blouse in the same colors, to look like a dress. I do this all the time with black tops and skirts, and people always think I am wearing a dress. Get pieces that can be laundered at home.
2. Search 'almond toe' on eBay and other shoe sites. It's a rounded toe with a little bit of elongation at the tip, but not a pointed toe Cole Haan makes some pretty nice ones. I've gotten mine via eBay and GW.
3. Unless you have a toddler or parrot that will snatch it right off your neck, there is no reason you can't wear your pearls or faux pearls with whatever outfit you are wearing.
Some good search words, on eBay, for similar styles to your Polyvore link: pin up, retro, Dita, bombshell, Mad Men, Joan