I'm gonna help you out a little bit here -I've been hesitant to do so because I personally can't tell you if the trade is fair. (I'm really bad at knowing values of older rare pets lol )
What I can do, however, is help other people help you. I've spent over an hour compiling the list of item worths here in hopes of getting you the help you need.
![Smile :)](./images/smilies/icon_e_smile.gif)
How I got the values: I searched through the "How Much is This Item Worth?" thread. Anything that hasn't been mentioned on the thread, a good rule of thumb is roughly 1 uncommon from the most recent year the item came out. If I couldn't find anything in particular about it on the thread, I assume that the item isn't "notable" enough to be worth the discussion and will default to this value after combing through the item archive to find the year. I will make a note with an asterisk when I am making this assumption.
So....I'm gonna get started breaking these items down:
1-2. Love PenPen (Red and Pink) - 1 late '09 rare/VR -EACH-
3. *Chinese Lantern - early '11 Uncommon
4. *Valentines Flowers -early-mid '11 Uncommon
5. *Pink Easter Basket - early-mid '11 Uncommon
6. Sheep - '11 Uncommon
7-14. Elven Set - Highly debated and variable item. '11 Uncommon EACH *minimum*, but a full set can go for 1-2 '09 rares or even a VR for just a few pieces depending on demand. The posts I'm referencing for value might be outdated, so please seek a second opinion for this set in particular.
15.
Treble Berries - I'm seeing conflicting info of '11 Uncommon - Rare all the way up to an '09 rare. I only found two posts referencing this item. It was released in 2011.
16-17. *Pumpkin Mask +Scarf - mid-late '11 Uncommon
18. *Deep Blush - early-mid '12 Uncommon
19. * White Tropical Flower - mid '12 Uncommon
20. *Big Pearl - mid '12 Uncommon
21-24. *Screwdrivers and Wrenches - 1 '12 Common each; I vaguely remember this being a free item pack that every got
25-26. *Toy/Paper Boats - '12 Uncommon each
27. *Eerie Black Contacts -'12 Uncommon - Rare; may have been a token trade-in item.
28. *Soul Cake - '12 Common to Uncommon; free Halloween item set
29. *Incense - '12 Uncommon
30. *Silver Stud - '13 Common to Uncommon
31. Nightmare - '13 Uncommon to Rare; was a banner item
32-33. Bat Armor - '13 Common to Uncommon each; was a token trade-in so it's worth a '13 Rare + as a complete set
34. Mobile - '13 Common to Uncommon each (was hard to find info since the search function brought up mobile phones lol)
35. Lunar Flower - '13 Common
36. Corrupted Dream Catcher - '13 Uncommon
37-40. Plague Doctor Set - '13 Uncommon to Rare
41. Christmas Sweater - '13 Uncommon
42. *Red Smoke Contacts - '14 Common to Uncommon
43. Skeleton Hoodie - mid-late '14 Uncommon
44. *Black Bell - Only one I could find. Likely between a '15 and '16 uncommon
45. Flurffle- '16 Uncommon to Rare
46-52. *Assorted Fish - '17 Common to Uncommon each
53-55. *Pearl + Kelp - '17 Common to Uncommon each
56. *Ship Lamp - '17 Common to Uncommon
57+ *Assorted 2021 Items - '21 Common to Uncommon each
With that, a lot of these items aren't worth more than an uncommon from the year that they were released! There's only a few that are worth a rare or higher.
That also said, finding a buyer for each of these items would be a lot of hard work.
ANYWAY, my apologies for the novel of information. I just noticed that you'd been struggling to find some info and I had some time to kill. If someone else could weigh in as to whether or not this is a fair trade for you, that would be fantastic.
![Smile :)](./images/smilies/icon_e_smile.gif)
I REALLY hope that this helps break everything down. Feel free to compile the info however you like and have a wonderful day. ^^